* {
    margin: 0;
    padding: 0;
    list-style: none;
}
.box {
    width: 100%;
    height: 100%;
    font-size: 15px;
    
    .box-top {
        width: 100%;
        height: 60px; 
    }
    .box-center{
        width: 100%;
        height: 691px;
        .box-center-left{
            width:13%;
            height: 100%;
            float: left;
        }
        .box-center-right{
            width: 87%;
            height: 100%;
            float: left;
            background: saddlebrown;
        }
    }
}